Bicycle frame



FIG. 1 is a perspective view of a bicycle frame;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof, showing accessory components.

The broken line showing accessory components is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 